Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6610875 | Electrochimica Acta | 2015 | 7 Pages |
Abstract
In this work, VO43â substitution for PO43â in the Nasicon structured Li3Sc2(PO4)3 was used to enhance its ionic conductivity. The VO43â substitution resulted in a homogeneous compound Li3Sc2(PO4)3-x(VO4)x within a wide composition range of 0 ⤠x ⤠1.2; further increase in x led to precipitation of the crystalline phases VPO5, V(PO3)3 and ScVO4. Electrical conductivity of the VO43â-substituted samples increased with the VO43â content, and the sample with x=1.5 exhibited the highest conductivity (8.41Ã10â3 S mâ1) at room temperature and the lowest activation energy (39.65 kJ molâ1). The obtained conductivity was two orders of magnitude higher than that of the non-substituted sample and nine times higher than those of the Zr4+ and SiO44â-substituted compounds. The present study demonstrates that the VO43â anion substitution for PO43â is a promising technique to improve ionic conductivity of the Nasicon compound.
Keywords
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Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Shuxin Geng, Yonggang Yang, Yongguang Zhang, Wei Ding, Xin Wang, Huifen Peng, Zhumabay Bakenov,